<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>监测数据变化的原理</title>
    <!-- 开发环境版本，包含了有帮助的命令行警告 -->
<script src="vue.js"></script>
</head>
<body>
    <div id="root">
        <h2>人员列表</h2>
        <button @click="updateMa">更新马冬梅信息</button>
        <ul>
            <li v-for="(p,index) in persons" :key="p.id">
                {{p.name}}-{{p.age}}--{{p.sex}}
            </li>
        </ul>
       
    </div>
   <script type="text/javascript">
    new Vue({
        el:'#root',
        data: {
            keyWord:'',
            persons:[
                {id:1, name:'马冬梅',age:28,sex:'女'},
                {id:2, name:'周冬雨',age:19,sex:'女'},
                {id:3, name:'周杰伦',age:20,sex:'男'},
                {id:4, name:'温兆伦',age:22,sex:'男'}
            ]
        },
        methods: {
            updateMa() {
                // this.persons[0].age=50  //有效
                // this.persons[0].name='马老师' //有效
                // this.persons[0].sex='男' //有效
                this.persons[0] = {id:1, name:'马老师',age:50,sex:'男'}
            }
        },
    })
   </script>
</body>
</html>